diff --git a/Makefile.am b/Makefile.am
index b23ba5d..fd4b335 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1 +1,4 @@
-SUBDIRS = ftests gunit
+DIST_SUBDIRS = ftests gunit
+if WITH_TESTS
+SUBDIRS = $(DIST_SUBDIRS)
+endif